# Syncthing 1.9 crashes TrueNAS Core Rc1
**URL:** https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636
**Category:** Support
**Created:** [September 19, 2020, 9:23am UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636 "2020-09-19T09:23:44Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@sgtpepperaut](https://forum.syncthing.net/u/sgtpepperaut)
#### Post date: [September 19, 2020, 9:23am UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636/1 "2020-09-19T09:23:44Z")
I have experienced this on two fresh TrueNAS install with syncthing being the only plugin installed.
Once ST is up and has a folder added the Host System is brought to its knees within a short time. GUI is unresponsive and service memory consumption grows extremely high (5gb on a 8gb system)
Scanning performance is working at relatively high/normal speeds but becomes unuseable quickly.
A user in the FREENAS forums suggest to disable “file watchers”. Are watchers not working in general on FREENAS / ZFS filesystem? or is this related to the ammount of files and folders being watche?
other people experiencing the same issue: see [https://www.ixsystems.com/community/threads/syncthing-issues-crashes-freenas-and-slow-speed.83309/](https://www.ixsystems.com/community/threads/syncthing-issues-crashes-freenas-and-slow-speed.83309/)
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### Author:  [@calmh](https://forum.syncthing.net/u/calmh)
#### Post date: [September 19, 2020, 12:03pm UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636/2 "2020-09-19T12:03:06Z")
> [@High memory usage](https://forum.syncthing.net/t/high-memory-usage/15586/6):
>
> 1.9.0 has increased memory usage for folders with many files, due to case sensitivity checks. We’re bringing that down a bit in 1.10.0. You might also set the case sensitivity option. (If your file systems are all in fact case sensitive.)
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### Author:  [@system](https://forum.syncthing.net/u/system)
#### Post date: [October 19, 2020, 12:03pm UTC](https://forum.syncthing.net/t/syncthing-1-9-crashes-truenas-core-rc1/15636/3 "2020-10-19T12:03:16Z")
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